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There are two electrons in the valance shell of helium. Since this is the first shell, it is filled by two electrons.
Eight - it has a full outer shell of electrons.
There are three valance electrons. These are the electrons in the outer shell if it is not full.
Hydrogen has one shell with only 1 electron on the valance shell.
there are 2 electrons in the inner shell of a hydrogen atom.
there are 8 electrons in the valence shell of neon
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Fermium has two electrons on the outer shell; valences of Fm are +2 and +3.
That neutral silicon atom has four electrons in its valence shell.
there are 8 electrons in the valence shell of neon
a lot
Group I A elements have 1 valance electron.